/*
 * Copyright (c) 2017, cxy7.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.b3log.solo.frame.urlfetch;

import java.io.IOException;
import java.util.concurrent.Future;

/**
 * URL fetch service.
 *
 * @author <a href="http://cxy7.com">XyCai</a>
 * @version 1.0.0.0, Aug 8, 2011
 */
public interface URLFetchService {

	/**
	 * Execute the specified request and return its response.
	 * 
	 * @param request
	 *            the specified request
	 * @return response
	 * @throws IOException
	 *             if the remote service could not be contacted or the request
	 *             URL could not be fetched
	 */
	HTTPResponse fetch(final HTTPRequest request) throws IOException;

	/**
	 * The asynchronous version of interface
	 * {@link #fetch(org.b3log.solo.frame.thread.HTTPRequest)}.
	 * 
	 * @param request
	 *            the specified request
	 * @return future response
	 */
	Future<?> fetchAsync(final HTTPRequest request);
}
